<?php

/**
 * This is an interface for main navigation
 * @author Honza
 */
interface INavigation {
  /**
   * Name of GET parameter form menu
   */
  const KEY = "where";
  
  /**
   * This method chooses right content according to KEY value.
   * @return content of page or subpage (html string)
   */
  public static function getContent();
  
  /**
   * If the KEY value is wrong, default is used.
   */
  public static function getDefault();
}

?>
